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qemu/tests/virtio-scsi-test.c
Stefan Hajnoczi e73255be96 virtio-scsi-test: add missing feature negotiation 
VIRTIO Device Initialization requires feature negotiation.  Currently
virtio-scsi-test.c is non-compliant.

libqos tests acknowledge all feature bits advertised by the device,
except VIRTIO_F_BAD_FEATURE (which devices use to detect broken
drivers!) and VIRTIO_RING_F_EVENT_IDX (which is not implemented in
libqos and accepting it would break notifications).

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20191023100425.12168-5-stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Thomas Huth" <thuth@redhat.com>
2019-10-25 07:46:22 -04:00

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/*
* QTest testcase for VirtIO SCSI
*
* Copyright (c) 2014 SUSE LINUX Products GmbH
* Copyright (c) 2015 Red Hat Inc.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "libqtest-single.h"
#include "qemu/module.h"
#include "scsi/constants.h"
#include "libqos/libqos-pc.h"
#include "libqos/libqos-spapr.h"
#include "libqos/virtio.h"
#include "libqos/virtio-pci.h"
#include "standard-headers/linux/virtio_ids.h"
#include "standard-headers/linux/virtio_pci.h"
#include "standard-headers/linux/virtio_scsi.h"
#include "libqos/virtio-scsi.h"
#include "libqos/qgraph.h"
#define PCI_SLOT 0x02
#define PCI_FN 0x00
#define QVIRTIO_SCSI_TIMEOUT_US (1 * 1000 * 1000)
#define MAX_NUM_QUEUES 64
typedef struct {
QVirtioDevice *dev;
int num_queues;
QVirtQueue *vq[MAX_NUM_QUEUES + 2];
} QVirtioSCSIQueues;
static QGuestAllocator *alloc;
static void qvirtio_scsi_pci_free(QVirtioSCSIQueues *vs)
{
int i;
for (i = 0; i < vs->num_queues + 2; i++) {
qvirtqueue_cleanup(vs->dev->bus, vs->vq[i], alloc);
}
g_free(vs);
}
static uint64_t qvirtio_scsi_alloc(QVirtioSCSIQueues *vs, size_t alloc_size,
const void *data)
{
uint64_t addr;
addr = guest_alloc(alloc, alloc_size);
if (data) {
memwrite(addr, data, alloc_size);
}
return addr;
}
static uint8_t virtio_scsi_do_command(QVirtioSCSIQueues *vs,
const uint8_t *cdb,
const uint8_t *data_in,
size_t data_in_len,
uint8_t *data_out, size_t data_out_len,
struct virtio_scsi_cmd_resp *resp_out)
{
QVirtQueue *vq;
struct virtio_scsi_cmd_req req = { { 0 } };
struct virtio_scsi_cmd_resp resp = { .response = 0xff, .status = 0xff };
uint64_t req_addr, resp_addr, data_in_addr = 0, data_out_addr = 0;
uint8_t response;
uint32_t free_head;
QTestState *qts = global_qtest;
vq = vs->vq[2];
req.lun[0] = 1; /* Select LUN */
req.lun[1] = 1; /* Select target 1 */
memcpy(req.cdb, cdb, VIRTIO_SCSI_CDB_SIZE);
/* XXX: Fix endian if any multi-byte field in req/resp is used */
/* Add request header */
req_addr = qvirtio_scsi_alloc(vs, sizeof(req), &req);
free_head = qvirtqueue_add(qts, vq, req_addr, sizeof(req), false, true);
if (data_out_len) {
data_out_addr = qvirtio_scsi_alloc(vs, data_out_len, data_out);
qvirtqueue_add(qts, vq, data_out_addr, data_out_len, false, true);
}
/* Add response header */
resp_addr = qvirtio_scsi_alloc(vs, sizeof(resp), &resp);
qvirtqueue_add(qts, vq, resp_addr, sizeof(resp), true, !!data_in_len);
if (data_in_len) {
data_in_addr = qvirtio_scsi_alloc(vs, data_in_len, data_in);
qvirtqueue_add(qts, vq, data_in_addr, data_in_len, true, false);
}
qvirtqueue_kick(qts, vs->dev, vq, free_head);
qvirtio_wait_used_elem(qts, vs->dev, vq, free_head, NULL,
QVIRTIO_SCSI_TIMEOUT_US);
response = readb(resp_addr +
offsetof(struct virtio_scsi_cmd_resp, response));
if (resp_out) {
memread(resp_addr, resp_out, sizeof(*resp_out));
}
guest_free(alloc, req_addr);
guest_free(alloc, resp_addr);
guest_free(alloc, data_in_addr);
guest_free(alloc, data_out_addr);
return response;
}
static QVirtioSCSIQueues *qvirtio_scsi_init(QVirtioDevice *dev)
{
QVirtioSCSIQueues *vs;
const uint8_t test_unit_ready_cdb[VIRTIO_SCSI_CDB_SIZE] = {};
struct virtio_scsi_cmd_resp resp;
uint64_t features;
int i;
vs = g_new0(QVirtioSCSIQueues, 1);
vs->dev = dev;
features = qvirtio_get_features(dev);
features &= ~(QVIRTIO_F_BAD_FEATURE | (1ull << VIRTIO_RING_F_EVENT_IDX));
qvirtio_set_features(dev, features);
vs->num_queues = qvirtio_config_readl(dev, 0);
g_assert_cmpint(vs->num_queues, <, MAX_NUM_QUEUES);
for (i = 0; i < vs->num_queues + 2; i++) {
vs->vq[i] = qvirtqueue_setup(dev, alloc, i);
}
qvirtio_set_driver_ok(dev);
/* Clear the POWER ON OCCURRED unit attention */
g_assert_cmpint(virtio_scsi_do_command(vs, test_unit_ready_cdb,
NULL, 0, NULL, 0, &resp),
==, 0);
g_assert_cmpint(resp.status, ==, CHECK_CONDITION);
g_assert_cmpint(resp.sense[0], ==, 0x70); /* Fixed format sense buffer */
g_assert_cmpint(resp.sense[2], ==, UNIT_ATTENTION);
g_assert_cmpint(resp.sense[12], ==, 0x29); /* POWER ON */
g_assert_cmpint(resp.sense[13], ==, 0x00);
return vs;
}
static void hotplug(void *obj, void *data, QGuestAllocator *alloc)
{
QTestState *qts = global_qtest;
qtest_qmp_device_add(qts, "scsi-hd", "scsihd", "{'drive': 'drv1'}");
qtest_qmp_device_del(qts, "scsihd");
}
/* Test WRITE SAME with the lba not aligned */
static void test_unaligned_write_same(void *obj, void *data,
QGuestAllocator *t_alloc)
{
QVirtioSCSI *scsi = obj;
QVirtioSCSIQueues *vs;
uint8_t buf1[512] = { 0 };
uint8_t buf2[512] = { 1 };
const uint8_t write_same_cdb_1[VIRTIO_SCSI_CDB_SIZE] = {
0x41, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x02, 0x00
};
const uint8_t write_same_cdb_2[VIRTIO_SCSI_CDB_SIZE] = {
0x41, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x33, 0x00, 0x00
};
const uint8_t write_same_cdb_ndob[VIRTIO_SCSI_CDB_SIZE] = {
0x41, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x33, 0x00, 0x00
};
alloc = t_alloc;
vs = qvirtio_scsi_init(scsi->vdev);
g_assert_cmphex(0, ==,
virtio_scsi_do_command(vs, write_same_cdb_1, NULL, 0, buf1, 512,
NULL));
g_assert_cmphex(0, ==,
virtio_scsi_do_command(vs, write_same_cdb_2, NULL, 0, buf2, 512,
NULL));
g_assert_cmphex(0, ==,
virtio_scsi_do_command(vs, write_same_cdb_ndob, NULL, 0, NULL, 0,
NULL));
qvirtio_scsi_pci_free(vs);
}
static void test_iothread_attach_node(void *obj, void *data,
QGuestAllocator *t_alloc)
{
QVirtioSCSIPCI *scsi_pci = obj;
QVirtioSCSI *scsi = &scsi_pci->scsi;
QVirtioSCSIQueues *vs;
char tmp_path[] = "/tmp/qtest.XXXXXX";
int fd;
int ret;
uint8_t buf[512] = { 0 };
const uint8_t write_cdb[VIRTIO_SCSI_CDB_SIZE] = {
/* WRITE(10) to LBA 0, transfer length 1 */
0x2a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00
};
alloc = t_alloc;
vs = qvirtio_scsi_init(scsi->vdev);
/* Create a temporary qcow2 overlay*/
fd = mkstemp(tmp_path);
g_assert(fd >= 0);
close(fd);
if (!have_qemu_img()) {
g_test_message("QTEST_QEMU_IMG not set or qemu-img missing; "
"skipping snapshot test");
goto fail;
}
mkqcow2(tmp_path, 64);
/* Attach the overlay to the null0 node */
qtest_qmp_assert_success(scsi_pci->pci_vdev.pdev->bus->qts,
"{'execute': 'blockdev-add', 'arguments': {"
" 'driver': 'qcow2', 'node-name': 'overlay',"
" 'backing': 'null0', 'file': {"
" 'driver': 'file', 'filename': %s}}}",
tmp_path);
/* Send a request to see if the AioContext is still right */
ret = virtio_scsi_do_command(vs, write_cdb, NULL, 0, buf, 512, NULL);
g_assert_cmphex(ret, ==, 0);
fail:
qvirtio_scsi_pci_free(vs);
unlink(tmp_path);
}
static void *virtio_scsi_hotplug_setup(GString *cmd_line, void *arg)
{
g_string_append(cmd_line,
" -drive id=drv1,if=none,file=null-co://,"
"file.read-zeroes=on,format=raw");
return arg;
}
static void *virtio_scsi_setup(GString *cmd_line, void *arg)
{
g_string_append(cmd_line,
" -drive file=blkdebug::null-co://,"
"file.image.read-zeroes=on,"
"if=none,id=dr1,format=raw,file.align=4k "
"-device scsi-hd,drive=dr1,lun=0,scsi-id=1");
return arg;
}
static void *virtio_scsi_setup_iothread(GString *cmd_line, void *arg)
{
g_string_append(cmd_line,
" -object iothread,id=thread0"
" -blockdev driver=null-co,read-zeroes=on,node-name=null0"
" -device scsi-hd,drive=null0");
return arg;
}
static void register_virtio_scsi_test(void)
{
QOSGraphTestOptions opts = { };
opts.before = virtio_scsi_hotplug_setup;
qos_add_test("hotplug", "virtio-scsi", hotplug, &opts);
opts.before = virtio_scsi_setup;
qos_add_test("unaligned-write-same", "virtio-scsi",
test_unaligned_write_same, &opts);
opts.before = virtio_scsi_setup_iothread;
opts.edge = (QOSGraphEdgeOptions) {
.extra_device_opts = "iothread=thread0",
};
qos_add_test("iothread-attach-node", "virtio-scsi-pci",
test_iothread_attach_node, &opts);
}
libqos_init(register_virtio_scsi_test);
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